With so many people coming and going this jump, Severus hasn't bothered keeping the main doors to this level closed - it's too much of a bother to go down there every single time he has to let someone without SCI nanite access in. But he does keep a close watch. Like now.

He stays where he is, quiet, and observes the fluttering visitor, elbows on the tabletop, fingers laced. He's as capable of going unnoticed as he is making dramatic entrances.

A moment after the absent apology, Severus finally speaks, his deep voice cutting through the silence like a light-switch suddenly being turned: "You're awfully eager to see what this is for someone who seems to think I'm ignorant about my own craft."